How to Convert HEIC to AVIF on macOS

Steps
-  Download Kompressor on the Mac App Store for free 
 - Open the Kompressor app
 - Drag and drop your HEIC image(s) into Kompressor
 - Select AVIF as your output format
 - Adjust compression settings as needed
 -  Click on the ▷   (play) button to convert your HEIC image(s) offline 
 
- Broader compatibility (more widespread browser support than HEIC)
 - Open-source format without licensing restrictions (unlike HEIC)
 - Superior compression efficiency using newer AV1 codec technology
 - Potentially smaller file sizes in many scenarios
 - Better parallelization capabilities for faster encoding/decoding
 - Support for both lossy and lossless compression
 - Alpha channel transparency support
 - High bit depth support (up to 12-bit)
 - HDR (High Dynamic Range) image support